While it is one of the most important ones, resolution would be comparably important in my view - and depending on the use case, it may be more important. If the Pimax added merely more FoV but at the cost of a lower resolution and more SDE, I would probably pass on it.
But fortunately for all the Rift & Vive owners, it does improve things across the board for a number of priority features, with relatively acceptable drawbacks (mainly brightness, colors, blacklevels, some distortion at the very outer rim). This makes me very excited for it because it will be the greatest improvement I can implement in my personal VR space within a term of likely 3-4 years since the release of the Rift & Vive in 2016. There are those who cannot be happy about it, so be it, I’ll let them deal with their own psychology, but I will be a enjoying the heck out of it once I get mine!